Biochemical and genetic studies of recombination proficiency in Escherichia coli. I. Enzymatic activity associated with recB+ and recC+ genes
- PMID: 4909471
- PMCID: PMC283009
- DOI: 10.1073/pnas.65.4.955
Biochemical and genetic studies of recombination proficiency in Escherichia coli. I. Enzymatic activity associated with recB+ and recC+ genes
Abstract
An adenosine triphosphate-dependent deoxyribonuclease activity has been detected in lysates of recB(+)recC(+) strains. Mutations in recB or recC lead to loss of this activity, suggesting that these two genes determine the nuclease activity. The over-all reaction in crude lysates digests native DNA to nucleoside monophosphates. Complementation between recB21 and recC22 in vivo leads to normal levels of ATP-dependent nuclease activity. No complementation in vitro has been detected. Mutations in a third recombination gene (recA) do not alter significantly the wild-type levels of this nuclease activity.
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